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Yitzhak Alfasi

Isaac Alfasi
Brockhaus and Efron Jewish Encyclopedia e2 149-0.jpg
Born 1013
Qalaat Beni Hammad, present day Algeria
Died 1103
Lucena, Cordoba
Other names Rif
Occupation Rabbi

Isaac ben Jacob Alfasi ha-Cohen (1013–1103) (Hebrew: ר' יצחק אלפסי, Arabic : إسحاق الفاسي) - also known as the Alfasi or by his Hebrew acronym Rif (Rabbi Isaac al-Fasi), was an Algerian Talmudist and posek (decider in matters of halakha - Jewish law). He is best known for his work of halakha, the legal code Sefer Ha-halachot, considered the first fundamental work in halakhic literature. He was born in the Algerian city of Qalaat Beni Hammad, but spent the majority of his career in Fes, and is therefore known as "Alfasi" ("of Fes" in Arabic).




Isaac Alfasi was born in Qalaat Beni Hammad, the capital city of the Hammadid rulers of central Maghreb. He studied in Kairouan, Tunisia under Rabbeinu Nissim ben Jacob, and Rabbeinu Chananel ben Chushiel the recognized rabbinical authorities of the age. Rabbeinu Chananel trained Alfasi to deduce and to clarify the Halakha from Talmudic sources, and Alfasi then conceived of the idea of compiling a comprehensive work that would present all of the practical conclusions of the Gemara in a clear, definitive manner. To achieve this goal, he worked for ten consecutive years in his father-in-law's attic.

In 1045, Alfasi moved to Fes with his wife and two children. Fes' Jewish community undertook to support him and his family so that he could work on his Sefer Ha-halachot undisturbed. They also founded a yeshiva in his honor, and many students throughout Morocco came to study under his guidance. The most famous of his many students is Rabbi Judah Halevi, author of the Kuzari; he also taught Rabbi Joseph ibn Migash (the Ri Migash), who was in turn a teacher of Rabbi Maimon, father and teacher of Maimonides (Rambam).


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